No, I've come to the realization that on this site, if you give an informed opinion on a kit, whether it has any minor or major inaccuracies or suggest any after market items, then you will be labeled a rivet counter. Therefore, the only opinion I will give on a kit here is buy it, build it out of box and have fun.
Edit:
Okay, I went out and dug out the instructions to my old, built -4V1 and compared it to my unbuilt -4M. I was wrong, and there is more part differences. The "B" sprue is the difference. On my unbuilt -4M, the hull side parts (B25 & B26) are different from the parts on the -4V1, but only part B25 has a different side hatch arrangement. The -4M side hull has a third molded on hatch about down through the side.
The right side of the turret has a different piece, B32, that replaces part D7 that is removed from the "D" sprue. There's also a flat, blob shaped object (parts B30 & B31) that goes on the top of the turret (probably some sort of radar) that isn't on the -4V1.
The rest of the kit parts and sprues are identical.